Almorha loach

The yo-yo loach is a lively, medium-sized botiid from the Ganges and Indus river drainages of northern India, Nepal, and Pakistan. Its common name derives from the distinctive juvenile pattern of alternating 'i' and 'y' shaped dark bars on a pale body, which often resemble the word 'yo-yo'. As the fish matures these markings break up into a variable pattern of spots. True Botia almorhae reaches 14–16 cm, but many fish sold as yo-yo loaches may belong to the closely related species B. lohachata or the undescribed B. sp. 'Kosi'.

In nature this species inhabits rivers and streams with rocky substrates, gathering in pools and calmer areas. The aquarium should mimic these conditions with a soft sandy substrate, smooth rocks, and driftwood that creates shady hiding spots. A base of at least 120 cm x 45 cm is recommended for a group. Good filtration and regular water changes are essential, as botiids are intolerant of organic waste. Unlike some of their relatives, yo-yo loaches prefer well-oxygenated water with moderate flow rather than turbulent conditions.

Yo-yo loaches are gregarious and should be kept in groups of at least six, ideally ten or more, to establish a stable social hierarchy. When kept singly they can become withdrawn or aggressive. They are generally peaceful with tankmates that are not small enough to be intimidated, but may nip the fins of slow-moving or long-finned species. Their diet is omnivorous with a carnivorous lean — they relish bloodworm, Tubifex, Artemia, and also accept quality dried foods with vegetable matter. They are enthusiastic snail hunters but should not be relied upon for pest control.